In this study, granular activated carbon (GAC) was used as an adsorbent for biogas desulfurization. Biogas containing 932–2,350 ppm of H₂S was collected from an anaerobic digester to treat the wastewater from a dairy farm with about 200 cows. An adsorption test was performed by introducing the biogas to a column that was packed with approximately 50 L of commercial GAC. The operation ceased if the effluent gas had an H₂S concentration of over 100 ppm. The GAC was replaced by a given weight of new GAC in a subsequent test. According to the results, for H₂S concentrations in the range of 932–1,560 ppm (average±SD = 1,260 ± 256 ppm), 1 kg of the GAC yielded biogas treatment capacities of 568 ± 112 m³ and H₂S adsorption capacities of 979 ± 235 g. For the higher influent H₂S concentrations of 2,110 ± 219 ppm, the biogas treatment and H₂S-adsorption capacities decreased to 229 ± 18 m³ and 668 ± 47 g, respectively. An estimation indicated a requisite cost of US$16.5 for the purification of 1,000 m³ of biogas containing 2,110 ppm of H₂S. This cost is approximately 5% of US$330, the value of 1,000 m³ of biogas.

Implications

Biogas generated from anaerobic digesters of animal manure and municipal wastewater sludge contains hydrogen sulfide which must be removed before it can be combusted in electricity-generation engines. This study demonstrated that commercial activated carbon adsorption can be an economical and effective approach for removing hydrogen sulfide from biogas. In this study, granular activated carbon (GAC) was used as an adsorbent for biogas desulfurization. The biogas containing 932–2,350 ppm of H₂S was collected from an anaerobic digester for treating wastewater collected from a 200 dairy farm. The adsorption test was performed by introducing the biogas to a PVC column packed with a commercial GAC of around 50 L. Operation ceased if the effluent gas had an H₂S concentration of over 100 ppm. A given weight of the new GAC was replaced for a successive test.

中文翻译：

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长期评估活性炭作为沼气脱硫的吸附剂

在这项研究中，颗粒状活性炭（GAC）被用作沼气脱硫的吸附剂。从厌氧消化池中收集了含有932–2,350 ppm H ₂ S的沼气，用于处理约有200头奶牛的奶牛场的废水。通过将沼气引入装有约50 L商业GAC的色谱柱中进行吸附测试。如果流出气体的H ₂ S浓度超过100 ppm ，则操作将停止。在后续测试中，将GAC替换为给定重量的新GAC。根据结果​​，对于H ₂ S浓度为932–1,560 ppm（平均值±SD = 1,260±256 ppm）的情况，1 kg的GAC产生的沼气处理量为568±112 m ³和H ₂S的吸附容量为979±235g。对于较高的进水H ₂ S浓度为2,110±219 ppm，沼气处理和H ₂ S吸附容量分别降至229±18 m ³和668±47 g。估计指示US $ 16.5一个必要费用的千米纯化³含有2110 ppm的H的沼气₂ S.该成本是US $ 330 1000 m的值的大约5％³沼气。

含义

从动物粪便和城市污水污泥的厌氧消化池产生的沼气中含有硫化氢，必须将其除去才能在发电发动机中燃烧。这项研究表明，商业活性炭吸附可以是一种从沼气中去除硫化氢的经济有效的方法。在这项研究中，颗粒活性炭（GAC）被用作沼气脱硫的吸附剂。从厌氧消化池收集了含有932–2,350 ppm H ₂ S的沼气，用于处理从200个奶牛场收集的废水。通过将沼气引入装有约50 L商用GAC的PVC色谱柱中进行吸附测试。如果流出的气体中含有H _2，则停止运行S浓度超过100 ppm。给定重量的新GAC被替换用于后续测试。